Envelope



July 27, 1937. c. B. OVERBAUGH, JR 2,088,068

ENVELOPE Filed June 2, 1936 nven lof Patented July 27, 1937 UNITED STATES -ENVELOPE Charles B. Overhaugh, Jr., Climax, Colo.

Application June 2,

1 Claim..

The present invention relates to new and useful improvements in envelopes and has for itsA an envelope of the character described which will be comparatively simple in construction, strong,

durable, highly eiicient and reliable in use, and which may be manufactured at low cost.

All of the foregoing and still further objects and advantages of the invention will become apparent from a study of the following specication', taken in connection with the accompanying drawing wherein like characters of reference designate corresponding parts throughout the several views, and Wherein:-

Figure 1 is a view in rear elevation of an envelope constructed in accordance with the present invention, showing said envelope closed.

Figure 2 is a fragmentary view in rear elevation, showing the envelope open.

Figure 3 is a fragmentary View in vertical section, taken substantially on the line 3-3 of p Figure 1. 1

Referring now to the drawing in detail, it will be seen that the envelope,v as usual, comprises aA back I, a front 2 and a flap 3 on said front 2. The inner side of the ap 3 is provided with an adhesive 4.

Mounted transversely on the back l of the envelope adjacent the top thereof is an adhesive rip tape which is curved substantially as shown to advantage in Figure 2 of the drawing. The rip tape 5 is impregnated with a suitable colored water soluble substance.

On the inner border of the adhesive area 4 the ,ap 3 is provided with perforations 6 and spaced outwardly therefrom is another row of perforations 1. Between the rows of perforations 5 6 and 1 the flap 3 ofthe envelope is further provided with a row of perforations 8.

The construction and arrangement is such that when the flap 3 is moistened, closed and secured in the usual manner the adhesive 4 covers the rip tape 5 with the perforations 6 and 1 extending along the longitudinal edges of said rip tape and the perforations 8 extending along the outer face 55 of said rip tape. It will further be see/n-that the end portions of the tape 5 project slightly beyond the closed ap 3 to facilitate obtaining a grip on 1936, Serial No. 83,083

said tape. Now, when it is desired to open the envelope this may be expeditiously done by grasping either'end of the tape 5 and pulling thereon in a manner to remove said tape from the back i of the envelope thereby ripping the flap 3 along the rows of perforations 6 and 'l for detaching the inner portion of said flap 3 from the outer portion of said ilap which is covered on one side by the adhesive 4, this last portion remaining on the back l. Should an attempt be made by an unauthorized person to open the envelope by the application of steam or water to the adhesive il the colored indicating substance with which the through the perforations 8. In addition to functioning in the aforementioned "armer, the tape 5 positivelysecures the several flaps constituting the back I of the envelope together.

It vis believed that the many advantages of an envelope constructed in accordance with the present invention will be readily understood, and although a preferred embodiment of the device is as illustrated and described, it is to be understood that changes in the details of construction and in the combination and arrangement of parts may be resorted to which will fall within the scope of the invention as claimed.

What is claimed isz- Inl an envelope comprising a back composed of several` flaps, a front and a closure flap on said front, said closure flap including an adhesive on one side of its free end portion, a rip tapel adtape 5 is impregnated will be dissolved and run hesivelymounted on the back to positively secure innerborder of the adhesive and further having a series of perforations thereinA spaced outwardly from the Airst-,named perforations, the first and second-named perforations extending along the longitudinal Y,edges of the rip tape and defining a detachable strip removable with said rip tape for disconnecting the inner portion of the closure flap which is free of the adhesive from the outer portion thereof carryingsaid adhesive, the rip tape being impregnated with a moisture soluble colored indicating medium, the closure flap fur` ther having a series of perforations therein between the first and second-named perforations.

for the escape of said indicating medium when it is dissolved.

CHARLES B. OVERBAUGH, Jn 

